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Topic 1, Scenario 1
Background
You are developing a Windows Store app by using C# and XAML. The app will allow users
to share and rate photos. The app will also provide information to users about photo
competitions.
Application Structure
The app stores data by using a class that is derived from the DataStoreBase class.
The app coordinates content between users by making calls to a centralized RESTful web
service.
The app has a reminder system that displays toast notifications when a photo competition
is almost over. The app gets the competition schedule data from the web service.
The app displays a list of images that are available for viewing in a data-bound list box. The
image file list stores paths to the image files. The app downloads new images from the web
service on a regular basis.
Relevant portions of the app files are shown. (Line numbers are included for reference only
and include a two-character prefix that denotes the specific file to which they belong.)
Business Requirements
The app must allow users to do the following:
Run the app on a variety of devices, including devices that have limited bandwidth
connections.
Share and synchronize high resolution photographs that are greater than 1 MB in
size.
Rate each photo on a scale from 1 through 5.
Technical Requirements
The app must meet the following technical requirements:
Retain state for each user and each device.
Restore previously saved state each time the app is launched.
Preserve user state and photo edits when switching between this app and other
apps.
When the app resumes after a period of suspension, refresh the user interface, tile
images, and data with current information from the web service.
Update the image list box as new images are added to the image file list.
Convert the image paths into images when binding the image file list to the list box.
The app must store cached images on the device only, and must display images or
notifications on the app tile to meet the following requirements:
Regularly update the app tile with random images from the user's collection
displayed one at a time.
Microsoft 70-484 : Practice Test
2
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